Latch mechanism



Feb. 24, 1942. H J, MURPHY 2,274,455

LATCH MECHANISM Filed April 9, 1940 6 Sheets-Sheet l HOWARD LJ. uNIuFuwr BY Mu, ATTY.

Feb. Z4, 1942. HfJ. MURPHY LATCH MECHANISM Filed April 9, 1940 6 Sheets-Sheet 2 INVENTOR HOWARD .Jr MURPHY BY ffemol, `ATTY.

Feb. 24, 1942. H. MURPHY 2,274,455

LATCH MEGHANISM Filed April 9, 1940 6 Sheets-Sheet 3 INVENTQR 45 HOWARD J. MURPHY 46 4 5,5" l l BY ATTY.

Feb. 24, 1942. H. J. MURPHYv 2,274,455 y LATCH MECHANISM Filed April 9, 194C 6 SlleetS--Sheefl 4 FIGTES.

IN'vENTOR HOWARD J MURPHY l Y mqi ATTY.

Feb. 24, 1942. H. J, MURPHY 2,274,455

LATCH MECHANISM l Filed April 9, 1940 6 Sheets-Sheet 5 INVENTQR HOWARD J. MURPHY BY ATTY.

Feb. 24, 1942. l H. J. MURPHY LATCH MEGHANISM 6 Sheets-Sheet 6 Filed April 9, 1940 INVENTOR HOWARD J. MURPHY `BAY @MENA- ATTY.

- ing device;

Patented Feb. 24, 1942 Es PATENT OFFICE LA'rcnriuEcnANlsM T Howard J. Murphy, Greenwood,v Mass., assigner to United-Carr Fastener Corporation, Cambridge, Mass., a corporation of Massachusetts Application April 9, Claims.v

This invention relates to improvementsvin a latching mechanism for closures and particullarly for door latches on automobile vehicles.l

'I'he invention `also relates to an improved method of assembling the `latching mechanism with an automobile door.

Other objects and uses of my invention will be apparent from inspection of the drawings and specification hereinbelow set forth.

Referring to the drawings, in which I have illustratedr preferred embodiments of my invention as applicd to the door of an automobile:

Fig. 1 is a front elevation4 of a portion of an automobile door showing the outer handle and other parts of my improved latch mechanism;

Fig. 2 is a section along theline 2 -2 of Fig. 1 showing the door in unlocked latched position;

Fig. 3 is a section along the line 3-3 of Fig. 2 and showing the locking dog of the outer lock- Fig. 4 is an end view of the door on the line 4-4 of Fig. `1, a portion of the keeper being shown in dotted lines;V

Fig. 5` is a perspective view of the locking lever operated onl from the inner handle mechanism on the inner side of the door to lock the latch mechanism;

Fig. 6 is a perspective view of a. latch bolt `forming a part. of the' latch mechanism;

Fig. 7 is a perspective .view of a link member forming a part of thek latch mechanism;

Fig. 8 is a sectional view of the rear of the latch mechanism taken on the line 8-8 of Fig. 2;

Fig. 9 is a sectional view of the latch boltand -link member. taken on the line 9-9 oi Fig. 2;

Fig. is a section taken on the line l5-l5 of Fig. 2 showing an opening in the outer face plate receiving a poition of the outer handle;

` Fig. 16 isa diagrammatic view showing the door in lunlatched position by `operation of the outer handle; l

Fig. 17 is` a diagrammatic view shoving the latch mechanisml lock=d -in latching position by the outer locking device;

Fig. 18 is a diagrammatic view showing the 1940, serial No. 328,124

(C1. 'zo-149) manner in which the door is` unlatched by operation of the inner handle mechanism;

Fig. 19 is a diagrammatic view showing the manner in which the latch mechanism is locked 5 in latching position from the inner side;

, Fig. 20 isa diagrammatic vview showing the door latchei in safety position;

Y, Fig. 21 isa diagrammatic view showing how rotatable movement of the locking lever is liml0 ited:

f Fig. 22 is a diagrammatic view showing the means by which the latch bolt is limited' in protracted position; v

Fig. 23 is a plan view of` the inner side of the l5 door taken in the direction of arrow A of Fig. 2

showing the inner handle mechanism for either retractingthe latch bolt or locking the latch mechanism from the inner side. The latch bolt is shown in normal protracted position;

Fig. 24` is a plan View showing the inner handle mechanism operating to retract the bolt;

Fig. 25 is a plan view of the inner handle mechanism operating to lock the bolt` in protracted position;

25 Fig. 26 is a sectional view .taken along the line 26-26 of Fig. 23"; f

Fig. 2'7 is a perspective view of the outer ends of the control' rods ofthe inner handle mechaf. Fig. 28 is a section taken along the line 28-28 of Fig. 23; f i

Fig. 29 is a section taken along the line 29-29 of Fig. 23. showing afastener clip` for aiding to maintain the control rods ofthe inner handle mechanism in adjacent relation t'o the inner side Fig. 30 is a section taken along the line 30--30 .v of Fig, 23;

Fig. 31 isa section in the direction of the "arro`w B of Fig. 29 and showing the method of attaching they fastener clip to the inner side of n Fig. 32 is a front view of a keeper plate in the direction of the arrow C'of Fig. 2;

Fig. 33 is a sectiontaken along the line 33-33 of Fig. 32';r

Fig. 34 is a section showing the` operation of the safety catch;`

Fig. 35 is a perspective view of the unit of latch mechanism with the outer handle shown in position to retract the bolt member;

Fig. l36 is a perspective view of `the outer side of the door showing the opening for entrance of the unit of latchmechanism shown in Fig. 35;

Fig. 37 Shows the iirst step in assembling the unit of latch mechanism with the door through the outer side of the door;

Fig. 38 is a view showing the second step in assembling the parts;

Fig. 39 shows the third step in assembling the parts; Q

Fig. 40 shows the position of the parts before moving. the unit of latch mechanism into iinal position relative to the sides of the door;

Fig. 41 is a diagrammatic view showing thev manner in which th'e locking lever is released by retraction of the latch bolt;

Fig. 42 is a diagrammatic view showing the cooperation of the latch bolt with the keeper during movement of the door to latchedposition to draw the door against the door jamb;

Fig. 43 is a view partly in section showing a modified form of inner locking mechanism; and

Fig. 44 is an elevation of the locking mechanism shown in Fig. 43.

Referring 'toFigs. 1 and 2 'of the drawings, I have shown a portion of an automobile door having spaced inner and outer sides I and 2 respectively and an edge 3. The door is of the type now commonly used in automobile manufacture the frame 4 and provides a runway for a sheet of raisable window glass 8 in a manner well known in the art. Upholstery material 1 (Fig. 1) is mounted upon lthe exposed face of the inner side I. The outer side 2 has an opening 8 which is rectangular, in mypreferred form, and spaced a predetermined distance from the edge 3 to receive a unit of latch mechanism 9 (Figs. 2 and 35) during assembly thereof with the door, as will be described. v The edge 3 has an opening I0 through which the bolt member I I of the latch mechanism projects when in normal protracted position. The edge .3 also provides a pair of countersunk openings I2-I2 (Figs. 13 and 37) for receiving attaching means such as the screws I3 for securing the latch mechanism in fixed assembly with the door. A striker plate or keeper I4 is secured to the door jamb I5 for cooperating latching engagement with the bolt` member II of the latch mechanism.

An inner handle mechanism I6 is secured in assembly with the inner side I of the door and y position to cooperate with the latch'm'echanism 9 to retract the bolt member I I from the inner side of the automobile and also to lock the latch' mechanism against retraction of the bolt member by operation of the outer handle. It will be seen, after study of the description hereinafter set forth in combination with the drawings, that one of the objects of my invention is directed to the improved assembly of the latch device with the door wherein the inner handle device including control rods to operate upon the latch mechanism to retract the latch bolt or to lock the latch mechanism from the inner side is secured to the inner side of the door and the unit of latch mechanism- 9`is assembled with the door by moving it through the opening 8 in the outer side 2 of the door and fixing it in position to permit proper operation of the control rods of the inner handle upon related parts of the unit 9. Furthermore, it will be seen that the parts of the unit of latch mechanism 9 are arranged in such a ferred form of unit of latch mechanism, as illustrated in Fig. 35, comprises a definite number of component parts, it is understood that certain of these parts may be omitted or others added without departing from the broader scope of my invention.

Referring in detail to the component parts of the unit 9, I have provided a latch mechanism supporting member I1 comprising a generally flat T-shaped bolt-supporting plate I8. The plate I8 has a neck portion I9 and a head portion or attaching portion 20 extending beyond the lateral edges of the neck portion I9 on opposite sides thereof. Spaced parallel walls 2I2I extend from opposite edges of the neck portion I9 in substantially right-angular relation thereto whereby the walls 2I2I and the neck portion define a shell-like part. A face plate 22 is assembled with the shell-like part adjacent one end and extends in substantially rightangular relation to the plane of the bolt-supporting plate I8. The face plate 22, which encloses an open side of the shell-like part, is preferably secured to the same through means of lugs 23 formed integral with the edges of the face plate and bent to engage outwardly flared edges 24 of the neck I9 and the walls 2I-2I, as most clearly shown in Figs. 13 and 14. 'I'he face plate 22, which has a greater area than the opening 8 of the side 2, is adapted to rest adjacent the exterior surface of the side 2 when the latch is in. permanent assembly with the door. The bolt-supporting plate I8 has a boltreceiving opening 25 adapted to align with the opening I0 of the edge 3. A pair of spaced wings 26--26 formed from material taken from within the opening 25 extends from th'e plate I8 in substantially perpendicular relation to the plane thereof and paralleltozhewalls 2 I-2I. Tubular embossments 2l are drawn from the head portion 20 of the bolt-supporting plate I8 and disposed on opposed sides ofthe bolt-receiving opening 25 to align with the screw-receiving openings I2 of the edge 3. The embossments 21 are internally threaded for cooperative threaded engagement with the threaded shanks of the screw means I3 to secure the unit 9 in xed attachment to the door.

The bolt member II, most clearly illustrated in Fig. 6, forming a part of the unit 9, is preferably formed from one piece of sheet metal and comprises a camming plate 28 and a curved keeper-engaging portion 29 for engagement behind a shoulder 30 of the keeper I4 when the door is in latched position. A radius 3| is preferably provided at the junction of the camming portion 28 and the keeper-engaging portion 29 to draw the latch bolt against the keeper during engagement of the bolt member with the keeper in closing the door (Fig. 42), as will be understood by those skilled in the art. Spaced narrow extensions or tall portions 32 extend outwardly from one end of the camming portion 28 and are adapted to be engaged by partA of the inner handle mechanism upon operation of the inner handle to retract the bolt. Bearings 33-33 (Fig. 6) are formed adjacent the keeper-engaging portion 29 and provide means for coupling the bolt member to another part of the latch mechanism, as will be described. Also.

movement of the bolt in protracted position `is limited by engagement of the bearings with they plate I 8, as shown in Fig. 22. Spaced parallel side portions 34-34 extend `outwardly from one 'side of the camming portion 28` in substantially perpendicular relation-A theretoy `.and provide aligned openings'35 (Fig. 6). The bolt member II is mounted for pivotalmovementv relative to the edge 3 of the doorvthrough means of the'pin 36 which extends through the Wings 26-26 of the bolt-supporting plate I8 and the openin s 35-35 of the bolt member. A spring member 3 bled with the pin 36 operates to hold the bolt member normally in'protracted position.

A link member 38 comprises a part'of` the unit 9 and cooperates mechanically' with the bolt pulling the bolt member to retracted position. as

assemmember II and an louter handle 39 to retract the bolt member on 'operationof the outer handle. The link member 38, as most clearly shown in Fig. 7, provides a hook-shaped end 40rand an opening 4I adjacent an opposite end. The link j member has a cam means in the form of a fold 42, in my preferred-form, extending outwardly from one side for mechanical cooperation with the outer locking device in a manner to be described. The link member 38y is secured to the bolt member `,I I` through means of y a pin ,43 extending through the bearings 33 of the bolt member and wings 44 extending outwardly from one side of the link member. Thus the link member is attached to the bolt .membermII so as to `be movable fore and aft on retraction andprotraction of the bolt member and at the same time it is pivotally movable relative tothe bolt member independently of its fore and`r aft movement. A spring member 45 assembledwith the pin 42 cooperates with the link `member and the bolt member to maintain the link member in predetermined position'relative to the Vouter handle 39 for a purpose to be described. y

The face plate 22 has an opening for receiving a portion of the outer handle 3 9. This opening is of C shape and comprises, las most clearly 4shown in Fig. 15, a pair of spaced parallel slots 46-46 and a slot 41 connecting the slots 46 at their ends.

The outer handle lhas a manually most clearly vshown in Figi. 16. When pressure onV the outer'handle for retracting Athe bolt is released, the handle returnsA to normal position under the tension of the spring 52 and the bolt member returns to normal protracted position under the force exerted by the spring 31.

The unit of latch mechanism 9, in my preferred form, also includes an'outer locking de-\ vice 53 assembled with the face plate 22 and providing an externally threaded shank 54 projecting through an opening 55 of the iface plate 22 (Fig. 2) and securedinassembly with the face plate by the nut member 56. A rotary key plug (not shown) is disposed within the sleeve 54 and movable on operation of the key 51,1 (Fig. 2). A locking dog in the form of an eccentric key l58 is assembled with the plug' at the inner end Vof the locking device and disposed in predetermined relationto the fold 42 of the link member 38. The eccentric key 58 provides a camming portion 59 (Fig. 3) engageable with the fold 42 of the link member on operation of the lock to move the link member outl of the line of movement of the bowed lingers 49, as most clearly shown in Fig. 17, thereby preventing actuation of the latch mechanism by operation ofthe outer handle.

The inner handle device 6, in my preferred installation, comprises a plate member 60 securedr shaft 63 extending through an opening 64 of operative portion 48 disposedl outside the side 2 in ahorizontal direction and spaced from the side 2 a distance su'cient toA enable the handle to be grasped by the lingers of `an operator, The

handle has an actuating portion in the form of spaced side-by-'side bowed lingers 49-49 at one endv extending through the connecting slot 4l and normally positioned for cooperative engagement with the hook-shaped end 40 of the link member 38 on actuation of the handle. The outer handle hasspaced parallel wing portions 50-50 extending through the slots 46-46 and the handle is secured in rotative assembly with the latch mechanism through means of the pivot pin 5l extending through the side 'walls 2I of the latch-supporting member and the wing portions 50. A spring member 52 assembled with the pivot pin 5I cooperates with the face plate 22A and handle 39 to maintain the handle in nor.

preventing unauthorized entrance of a tool means through the face plate to tamper with the latch mechanism.

In operation of the latch mechanism to rethe plate 6I. The lever 62 is secured at opposed ends in mechanical connection to control rods 65 and 66 in a way to effect protraction of the control rod B5 when the lever 62 is rotated in a clockwise direction, viewing Fig. 23, and protraction of 'the rod 66 when the lever 62 is rotated in` a counterclockwise direction. A manually operated means such as the inner handle 61 is mechanically engaged with the shaft 63 so as to rotate the lever 62 in a desired direction by moving the handle downwardly or upwardly. rl'he control rod 65 is adapted to re` tract the bolt member II and provides ngers 68-69 at its end remote from that in connection with the lever 62. The lingers 68--68 provide angularly extending free end'portions 68a in alignment with the tail portions 32-32 of the latch bolt member and normally spaced therefrom, as most clearly shown in Figs. 2 and 23. Thuswhen the inner handle 61 is'turned downwardly, looking atFig. 23, the lever 62 is rotated in a clockwise direction moving the control rod 65 forward to engage the ends 66a with the tail portions 32 ofy the bolt member thus moving the tail portions in the direction of the edge 3 of the door so as to retract the bolt, as most clearly shown in Fig. 18. Retraction of the bolt is limited upon abutment of the tail `as shown in Figs. 16 yand 24. When pressure upon the inner handle 61 is released, a spring member 88 returns the control rod 85 to normal position and the bolt member returns to normal protracted position under the force of the spring 81. It will be seenthat both the control 85 and 88 are bent intermediate their ends so as to extend from outside the door through the opening 18 (Fig. 23) of the side I into the interior of the door.

The control rod 88 is adapted to eiect locking of the latch mechanism from the inner side of the automobile upon movement of the handle 81 in an upward direction and is adapted for reciprocable movement'relative to the control rod 85 independently thereof. The control rod 88 has a finger 1I having an angularly turned portion 12 at its outermost end engageable with a locking lever 18 on protraction of the rod 88 to lock the latch mechanism against retraction of the latch bolt by operation of the outer handle. As

a means for aiding to maintain the control rods 85 and 88 in close relation to the side I and to each other adjacent their outer ends, I have provideda fastener member 14 which is secured in snapv fastener engagement with the side I through the aperture 18 thereof. The snap fastener member. as most clearly shown in Fig. 29, has support-engaging portions 18 engaging the exterior surface 11 of the inner side and yieldable attaching portions 18 extending through the opening' 15 and providing shouldered wings 19 engaging an inner surface 88 of the side I to secure the fastener member in assembly with the side I. A connecting portion 8| joins the attaching portions 18-18 at their ends away from the support-engaging portions 18 and has a yieldable depressed portion 82. The control rods 85 and 88 are maintained in assembly with each other and with the side I between the depressed portion 82 and the inner surface 80 of the side I (Fig. 29).

The locking lever 13, in my preferred form, forms a part of the unit of latch mechanism 8. 'I'he locking lever 13 is mounted for relative pivotalmovement and xed in assembly with the latch bolt I l between the side walls 34-34 by the pin 38 which extends through an opening 83 (Fig. formed intermediate the ends of the lever 13. The transverse edge 84 at one end of the locking lever is inclined relative to an adjacent lateral edge 85.(Fig. 5) to form a point 88 which is arranged in predetermined position relative to the end 81 of the link member 38 and engageable with the link member to eifect locking of the latch mechanism as hereinbelow described. The point 88 has a radius, as shown in Fig. 19, to aid disengagement of the locking member from the link member, as hereinbelow described.

`In locking the latch mechanism from the inside of the automobile, the inner handle 51 is raised upwardly, as shown in Fig. 25, thereby protracting the control rod 88 to engage the angularly turned end 12 thereof with the end 88 of the locking lever 18. During this action the inclined edge 84 of the locking lever engages the end 81 of the link member 38 thereby rotating the link member against the tension of the spring 45 and moving the hook-shaped portion 48 upwardly out of the line of movement of the ngers 48 of the outer handle. At this time the point 88 of the locking lever has moved into alignment with the opening 4| of the link member and is received within the opening 4I as a result of the tendency of the spring 45 to return the link member to normal position and cooperates with the walls of the opening 4I to maintain the link member in raised position, as most clearly shown in Fig. 19. When pressure upon the inner handle for actuating the lever 13 is released. the control rod 88 is returned to normal position by action of a spring 88. In Fig. 21 I have illustrated the means by which rotation of the locking lever 13 during actuation thereof is limited by abutment of its end 88 with the bolt-supporting plate I8.

Release of the locking lever is effected simultaneously with retraction of the latch bolt as by actuation of the inner handle. Thus during re traction of the bolt the link member 38 moves forwardly with the bolt and carries the locking lever with it until the end 88 of the locking lever abuts the bolt-supporting plate I8, as shown in Fig. 4l. Continued retraction of the latch bolt -moves the link member forwardly and upwardly and during this movement the wall of the opening 4I of the link rmember rides over the radius of the point 88 thereby disengaging the opening 4I from the point 88. As the bolt returns toward normal protracted position, the end 81 of the link member again engages the inclined edge 84 substantially as shown in Fig. 41 moving the link member in the direction of the edge 3 of the door until the bolt is completely protracted, at which time the link member and locking lever will have assumed the normal relative positions illustrated in Fig. 2. Similarly, if, when the door is in open position, the locking lever should be moved into locking position, engagement of the bolt member with the keeper, as shown in dotted lines in Fig. 41, during closing of the door, will unlock the mechanism. Thus it ls impossible for an operator of the vehicle to lock the doors leaving his keys inside.

In Fig. 43 and 44 I have illustrated a modified form of locking mechanism operable from the inner side of the door to move the locking lever 13 into locking engagement with the latch mechanism. My modiiied form of locking device includes a. supporting member secured to the side I ofthe automobile door and carrying spaced upstanding wings 9I. A manually operable lever 82 is pivotally assembled with the supporting member 88 between the wings 8| and has an end portion 88 in position to engage the end 88 of the locking lever to move the lever into locking position on manual operation of the lever 82.

The keeper I4 may be of any well known construction, but I have preferably provided one comprising a block 84 having an outwardly extending portion providing a shoulder 38 facing in the direction of the inner side I of the door (Fig. 2) and a safety catch 85 pivotally assembled with the keeper and providing a shoulder 88 to engage the bolt member in safety position, as shown in Fig. 20. The safety catch is maintained in bolt-engaging position under the tension of a spring 81 and is rotatable against the tension of the springwhen engaged by the bolt member during closing of the door. as most clearly shown in Fig. 34.

'Ihe method of assembling my improved latch mechanism with a door is relatively simpleand directed particularly to satisfying the demand of automotive manufacturers for a latch mecha' suit of the factthat the greatest dimension of the head portion 20 is greater than the distancebetween dlametrical opposed corners of the-rectangular opening 8, the'head portion I8 is moved through theopening through inserting one end thereof into the opening at one corner, as most clearly shown in Fig. 37, and then moving the opposite end thereof into the opening, as shown in Fig. 38. During insertion of vthe head portion I8 through the opening, the head portion is positioned diagonally relative to the opening 8, asv

shown in Fig. 38. Next, viewing Fig. 38, the unit 8 is rotated in a counterclockwise direction for approximately 45 to dispose the head portion- 20 in vertical position, as shown in dotted lines in Fig. 39. After this action, the latch unit is moved` to the right, looking at Fig. 39, to dispose the unit adjacent the' wall 98 of the opening I8, which is nearest to the edge 3 of the door. Pefore moving the latch mechanism into ilnal position, itis necessary to retract the bolt by operation of the outer handle due to the fact that the cross-sectional dimension of the unit 9 throughzthe bolt when the bolt is in protracted position is greater than the distance between the Window channel frame I and the edge 3. Thus after the bolt has been retracted, the unit is pushed inwardly toward the side I until thek unit is in proper position with the embossments 21--21 in alignment with the openings I2--I2 of the edge 3 and the bolt member in alignment with the opening IU of the edge 3, at which time the bolt member springs outwardly through the opening l into normal protracted position. Finally the unit 9 is secured in iixed attachment to the door by inserting the screws I3 through the openings I2 of the edge into threaded engagement with the threaded embossments 2,1-21 of the bolt-supporting plate I8. After this action the parts of the unit 9 are in proper position for operation thereof by the control rods 65 and 66 of the inner handle device.

Thus it will be seen that by my invention the latch mechanism may be attached to the door i quickly and easily from a position entirely outside the door.

Furthermore, the unit of latch mechanism 9 may be quickly detached from the door by an operation reverse to that of its insertion should it be necessary to repair any part of the same. As a result, it is `not necessary to take down the upholstery panel or other parts of the door in order to repair the latch mechanism.

Although I have illustrated anddescribed preferred embodiments of my'invention, I do` not wish to be limited thereby because the scope of my invention is best dened by the following claims.

I claim:

1. A latch mechanism comprising parts preassembled in the form of a unit including a latch-supporting member having a face plate applicable to a side of a door and an attaching plate extending in angular relation to the plane of said face plate, said attaching plate being applicable to an edge of said door and having openings for receiving attaching members and a boltreceiving opening therein, a bolt member pivotally mounted on one side of said attaching plate having a keeper-engaging portion projecting through said opening of said bolt-supporting plate in normal protracted position, a link member pivotally attached to said bolt member, and a handle part pivotally mounted to said latch supporting member and extending through said face plate member, said handle part having an arc on operation of said handle to engage said link member to move said link member for retracting said bolt, and a lock assembled with said mechanism including a rotatable dog engageable with said link member on operation of said lock to move said link member out `of the lineof movement of said actuating portion of said handle.

2. A. latch mechanism comprising parts preassembled in the form of a unit including a latch-supporting member applicable to the hollow interior of a door, said latch-supporting member comprising a shell portion at one end having an end wall and spaced sidewalls integral with said end wall and extending on one side thereof, an attaching plate forming a continuation of said end wall, said attaching plate being applicable to an edge of said door for securing said unit to said door and having a bolt-receiving opening therein, a bolt-member mounted on one side offsaid attaching plate having a keeperengaging portion projecting through said opening of said attaching plate in protracted position, a link member attached to said bolt member, and a movable handle assembled with said latchsupporting member within said shell portion, said handle member and said link member having meansinterengageable on operation of said handle member to move said link member to retract said bolt.

3. A latch mechanism comprising parts preassembled in the form of a unit including a latch-supporting member applicable to the hollow interiorm of a door, said latch-supporting member comprising a shell portion at one end having an end wall and spaced sidewalls integral with said end wall and extending on one side thereof, a face plate secured to said shell portion to cover an open side thereof, said face plate being applicable to a side of said door, an attaching plate forming a continuation of said end wall, said attaching plate being applicable to an edge of said door for securing said unit to said ing of said attaching plate in protracted position,

a link member pivotally attached to said bolt member, and a handle member pivotally assembled with said latch-supporting member between said sidewalls of said shell portion, said handle member extending through said face plate, and said handle member and link member having means interengageable on operation of said hanglet to move said link member to retract said ol l 4. In a hollow door having spaced sides and an edge, said edge and at least one of said sides each having an opening; a door latch mechanism, said mechanism including a latch-supporting member extended into the interior of said door only through said opening of said side, said latchsupporting member having an attaching plate abutting said edge of said door, screws extending through said plate and said edge to secure said latch-supporting member to said door and said screws at said edge being the only fastener members extending through said parts, said attaching plate having an opening in alignment with said Iopening of said edge, a bolt member mounted on one side of said attaching plate, said bolt 'member having a keeper-engaging portion proparte` inv projected position thereof, and said mechanismincluding means for actuating said bolt to retract the same.

5. In a hollow door having spaced sides and an edge, said edge and at least one of said sides having an opening; a door latch mechanism, said mechanism including a latch supporting member extended into said door only through said opening of said'side. said latch-supporting member having a shell portion comprising an end wall and spaced side walls extending on one side of said end wall, an attaching plate forming a continuation of said end wall and abutting said edge oi' said door, screws extending through said attaching plate and said edge to secure said latchsupporting member to said door and said screws at said edge being the only fastener members extending through said door and said latch-supporting mechanism, said attaching plate having an opening in alignment with said opening of said edge, a bolt member mounted on one side ot said attaching plate, said bolt member having a keeper-engaging portion projecting through said aligned openings of said parts in projected position thereof, and a face plate in assembly with said shell portion and disposed on the outer surface of said apertured side of said door. HOWARD J. MURPHY. 

